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Bearing structure for vehicle pedal device and flanged bushing

Inactive Publication Date: 2017-08-10
TOYODA IRON WORKS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The invention is about a bearing structure for a vehicle pedal device. The technical effects of the invention include improved support rigidity for the boss, reduced wear and abnormal noise, and improved ease of assembly. The narrow portion of the flanged bushing is designed to deflect and deform when the support member is inserted, ensuring stability and preventing wobbling and noise. The parallel portions on the narrow portion help restrain local wear and improve durability. The inner and outer surfaces of the narrow portion have an arc shape, which allows for easy assembly and reduces sliding resistance. The flanged bushings have groove-like grease reservoirs and can be easily molded. Overall, the invention provides a stable and reliable bearing structure for the vehicle pedal device.

Problems solved by technology

Accordingly, abnormal noise can be generated by wobbling or tilting of the boss of the pivot member (such as a vehicle pedal) with respect to the support member due to an offset load etc. that is applied when the pedal is depressed.

Method used

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  • Bearing structure for vehicle pedal device and flanged bushing
  • Bearing structure for vehicle pedal device and flanged bushing
  • Bearing structure for vehicle pedal device and flanged bushing

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embodiment

[0031]An embodiment of the present invention will be described in detail below with reference to the accompanying drawings. In the following embodiment, the drawings other than FIGS. 4 and 5 are shown simplified or deformed as appropriate for explanation purposes, and the proportions, shapes, etc. of the parts are not necessarily accurately shown in the drawings. The proportions and shapes shown in FIGS. 4 and 5 are close to the actual proportions and shapes in order to facilitate understanding.

[0032]FIG. 1 is a left side view showing a brake pedal device 10 for service brakes of vehicles to which the present invention is applied, and FIG. 2 is an enlarged sectional view taken along line II-II and viewed in the direction II in FIG. 1. The brake pedal device 10 includes a brake pedal 12. The brake pedal 12 is supported at its upper end by a pedal bracket 14 such that the brake pedal 12 can pivot about a support axis 51, which is substantially horizontal. A stepping portion 16 such as...

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PUM

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Abstract

Bearing structure of a pedal device, wherein a support member having a cylindrical outer peripheral surface is fixedly attached to a pedal bracket to be substantially horizontal, a boss of a pivot member radially outside the support member via a pair of flanged bushings each made of resin and having a flange portion at one end of a cylindrical portion so the boss turns about an axis, both axial ends of the flanged bushing cylindrical portion closely contact the boss inner peripheral surface; the flanged bushing cylindrical portion have, in intermediate portion, in an axial direction, a narrow portion having both inner and outer peripheral surfaces reduced in diameter so the narrow portion is curved inward in radial direction; the narrow portion smallest inside diameter being smaller than the support member outside diameter having interference; at least the narrow portion smallest diameter portion of elastically closely contact the support member outer peripheral surface.

Description

TECHNICAL FIELD[0001]The present invention relates to bearing structures of vehicle pedal devices, and more particularly to an improvement in flanged bushing that is disposed between a support member and a boss.BACKGROUND ART[0002]Bearing structures of vehicle pedal devices are known in the art in which a support member having a cylindrical outer peripheral surface is fixedly attached to a pedal bracket to be substantially horizontal, and a boss of a pivot member is disposed radially outside the support member such that the boss can turn about an axis via a pair of flanged bushings each made of a resin and each having a flange portion at one end of a cylindrical portion. In such bearing structures, predetermined clearance (backlash) is typically provided in the radial direction and the axial direction in view of dimensional variation etc. that is caused by manufacturing variation of components. Accordingly, abnormal noise can be generated by wobbling or tilting of the boss of the pi...

Claims

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Application Information

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IPC IPC(8): F16C17/10F16C27/02F16C33/04F16C17/26
CPCF16C17/10F16C17/26F16C2326/20F16C33/04F16C27/02G05G1/30G05G1/44F16C11/045F16C17/105F16C25/04F16C33/20F16C2370/00
Inventor FUJIWARA, NOBORU
Owner TOYODA IRON WORKS CO LTD
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